This the base I am referring to.

I swept around tub as much as I could.

Not sure what you're asking, but the PVC looks like a drain stub out.

@Ripped Jeans Construction I was just asking if the broken concrete base supposed to look like that.

You are looking at a standard "concrete box out" which, in this case, is formed with a plastic "tub box" that creates an oversized hole in the slab for a rough tub drain pipe. Your contractor will eventually remove the pan and fill the hole with concrete level with the slab.

Oh okay, now there is oncrete added to it, but it broke up. Will the plumber have to remove the plastic tub box?

"Your contractor will eventually remove the pan and fill the hole with concrete level with the slab."

From RES2 post above..................